期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 291, 期 -, 页码 266-274出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.04.090
关键词
Porous microsphere; NiFe2O4; Acetone sensor; One-step solvothermal approach
资金
- National Key Research and Development Program [2016YFC0207300]
- National Nature Science Foundation of China [61722305, 61833006, 61520106003]
- Science and Technology Development Program of Jilin Province [20170520162JH]
- China Postdoctoral Science Foundation [2017T100208, 2015M580247]
Spinel-type oxides have attracted a broad interest in sensing materials research owing to their high catalytic activity and flexibly tunable chemical properties. Here, we report the synthesis of superfine porous NiFe2O4 microspheres by one-step solvothermal approach, in order to fabricate ultra-sensitive acetone sensors for real-time monitoring, relying on the high catalytic activity of NiFe2O4 and effective mass transfer property of porous microspheres structure. The porous NiFe2O4 sensors displayed high selectivity to acetone against other interfering gases, giving a high sensitivity (27.4), fast response time (2s) towards 100 ppm acetone and low detection limit (200 ppb) at 250 degrees C. This paper proposed a general approach for fabricating highly sensitive gas sensor based on spinel-type oxides in monitoring volatile organic pollutants.
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